172949806777 has 8 divisors (see below), whose sum is σ = 188683549632. Its totient is φ = 157217902800.

The previous prime is 172949806769. The next prime is 172949806787. The reversal of 172949806777 is 777608949271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172949806777 - 2³ = 172949806769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172949806727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259258 + ... + 642739.

It is an arithmetic number, because the mean of its divisors is an integer number (23585443704).

Almost surely, 2^172949806777 is an apocalyptic number.

It is an amenable number.

172949806777 is a deficient number, since it is larger than the sum of its proper divisors (15733742855).

172949806777 is a wasteful number, since it uses less digits than its factorization.

172949806777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919439.

The product of its (nonzero) digits is 74680704, while the sum is 67.

The spelling of 172949806777 in words is "one hundred seventy-two billion, nine hundred forty-nine million, eight hundred six thousand, seven hundred seventy-seven".